Determination and characteristic analysis of aroma components of different varieties of rabbit-eye blueberries in Guizhou

To investigate and clarify the aroma components and contents of different varieties of Guizhou rabbit-eye blueberries, this study used headspace-solid phase microextraction and gas chromatography-mass spectrometry(HS-SPME/GC-MS)methods to analyze the aroma components content of the main rabbit-eye blueberry grown in Guizhou, such as ‘Coastal', ‘Britewell', ‘Climax', ‘Tifblue' and ‘Powderblue'. The results were as follows:(1)A total of 46 aroma components in 7 categories were detected in the 5 varieties, including 8 types of alcohols, 13 types of terpenes, 9 types of benzenes, 3 types of aldehydes, 5 types of esters, 4 types of alkanes, and 4 types of others.(2)‘Climax' has the most aroma components with 33 types, while ‘Powderblue' has the least with only 24 types; among the aroma components of each variety, aldehydes account for the largest proportion, followed by benzenes, with ‘Britewell' having the highest content of aldehydes(59.32%)and ‘Powderblue' the highest content of benzenes(42.58%).(3)Among the five varieties, ‘Coastal' has the highest total content of aroma components, at 172 872.18 ng·g-1, followed by ‘Britewell' at 162 200.88 ng·g-1; ‘Coastal' and ‘Powderblue' have lower total aroma component contents, at 91 284.45 ng·g-1 and 97 511.10 ng·g-1, respectively. The significant differences in aroma components and contents among these five rabbit-eye blueberry varieties provide an important basis for the selection of blueberry varieties and the choice of raw materials.